5" Antique Bohemian Kralik Threaded Vase. Beautiful red ar glass vase with blue and green iridescent hues with a threaded overlay. Vase has four subtle indentations on four sides, this makes it easy to pick up. The rim is polished flat with original finish. The vase is in beautiful condition with no chips or cracks. The iridescent finish is nice with no scratches or rubs. Circa 1900-1910. Beautiful red art glass vase with an iridescent finish.